DocumentCode :
3812386
Title :
Principles of quasistatic magnetic shielding with cylindrical and spherical shields
Author :
J.F. Hoburg
Author_Institution :
Dept. of Electr. & Comput. Eng., Carnegie Mellon Univ., Pittsburgh, PA, USA
Volume :
37
Issue :
4
fYear :
1995
Firstpage :
574
Lastpage :
579
Abstract :
The basic principles that underlie materials-based quasistatic magnetic shielding are described. Shielding mechanisms are identified and shown in specific examples that involve long cylindrical and spherical shield geometries. Analytic results are given both for shields that enclose the shielded region and for shields that enclose the source. The two configurations are reciprocal in the sense that identical shields have identical shielding factors for a uniform externally applied field and for a dipole source within the shield. Flux shunting and induced current shielding mechanisms are each described quantitatively and qualitatively in shielding situations where only one mechanism is involved. Situations where the mechanisms are simultaneously involved are then analyzed, and the relevances of the descriptions that involve only one mechanism are identified as regimes within the general descriptions.
Keywords :
"Magnetic shielding","Magnetic field measurement","Magnetic materials","Power transmission lines","Transmission line theory","Strips","Microstrip","Conducting materials","Pulse measurements","Electromagnetic measurements"
Journal_Title :
IEEE Transactions on Electromagnetic Compatibility
Publisher :
ieee
ISSN :
0018-9375
Type :
jour
DOI :
10.1109/15.477342
Filename :
477342
Link To Document :
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